Replay QA acts like a swarm of seasoned app testers.
It explores your app on its own, detects the user journeys, and comes back with bug reports so your agent can fix them.
01 Start
Drop in a URL. Replay QA takes it from there.
Paste any live web app URL and Replay QA gets to work immediately. No test suite to write or maintain. It handles all of it.
02 Exploration
It discovers the user journeys
Replay QA clicks through your app the way a new QA hire would, with no spec and no one to show them around. It finds the pages, the paths between them, and the journeys your users take most — including the ones nobody wrote down.
03 Testing
It tests your app thoroughly
Replay QA spins up a swarm of agents that runs all of the mapped journeys in parallel, in a browser. You can watch them work in real time.
Each journey test gets recorded, capturing every DOM mutation, every network call, every JavaScript frame — all the data needed later to figure out why something doesn't work.
04 Analysis
It analyzes the failed tests
For all tests that fail, our agents time-travel through the recordings to find out why. Because our recordings are deterministic, the session behaves identically every time it's replayed — so the agents work from the full runtime picture instead of a guess. They can see the state of the page, the network calls, and the code that ran.
They're reading what your app did, not what the code says it should do.
- Deep runtime bugs: React component failures, elusive state mutations, race conditions, async timing
- UI glitches: layout shifts, broken buttons, elements hidden behind overlays
- Accessibility failures: WCAG contrast violations, missing ARIA labels, keyboard traps
- Performance problems: slow network calls, render-blocking resources, long tasks
05 Reports
It writes detailed bug reports
The agents don't just find bugs — they write the report. Each one comes with everything needed to understand and fix the issue immediately.
- A video recording of the exact moment the bug occurs
- Annotated screenshots with problem areas highlighted
- A root cause analysis: specifically what, where, and why
- A suggested fix, ready to paste directly into your coding agent
Bugs are grouped by type and severity so you always know where to start. If you connected a GitHub repo, reports go to your agent automatically — no copy-pasting required.
06 The Loop
Fix. Ship. Verify.
Apply the fixes from the Replay QA bug reports, ship it, and run it again. The same journeys re-run, confirming the fix and catching anything it broke. If you've made other changes to your app, they'll be detected and tested automatically.
If you're running this on a GitHub repo, a new test run triggers on every push to main and with every PR (configurable).
Test your app for free.
Give Replay QA a URL. No test suite, no QA team, no credit card required.